Logo! AM2 AQ analog output module, device uses stereo Aux cable

Just to Hijack this thread a little

Got an AM2 AQ myself

using two analog outputs 0-10v to control a device

Checked the Manuel page 48 :) 

so one uses V1 and M1 ,other uses V2 and M2 voltages work great in 0-10V range with appropriate software no problem.

The issue I have is the device uses a stereo Aux cable which only has three connections. The voltages work fine on V1 and V2 if I use M1 or M2 so which do I use ?

does it matter ?

or should I connect M1 and M2 together then use that as a conman return feed?

Sorry for not being very technical but using the Logo8 to control something in my hobby and no electricain here just a ***

Many thanks for any replies

Zeus

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Split from Additional Terminals on Logo! AM2 AQ analog output module.